Metastron TM is Strontium Chloride containing Strontium-89 that is FDA approved to help ease pain due to bone lesions from spreading cancer. Strontium- 89 undergoes with a half life of 50.5 days. Since it is in the same group in the periodic table as calcium, it is easily absorbed in the bone. The recommended dose of Matastron is 148 MBq, half of which will be absorbed in the bones. After 353.5 days, exactly 7 half lives, how much energy has been absorbed by the 11kg of bones due to Strontium- 89 decay